| publications-2171 |
Peer reviewed articles |
2022 |
Ramler, D; Stutter, M; Weigelhofer, G; Quinton, JN; Hood-Nowotny, R; Strauss, P |
Keeping Up with Phosphorus Dynamics: Overdue Conceptual Changes in Vegetative Filter Strip Research and Management |
Frontiers in Environmental Science |
10.3389/fenvs.2022.764333 |
IoT & Sensors |
Irrigation Systems |
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Vegetative filter strips (VFS) are best management practices with the primary aim of protecting surface waters from eutrophication resulting from excess nutrient inputs from agricultural sources. However, we argue that there is a substantial time and knowledge lag from the science underpinning VFS to policy and implementation. Focussing on phosphorus (P), we strive to introduce a holistic view on VFS that accounts for the whole functional soil volume, temporal and seasonal effects, the geospatial context, the climatic and physico-chemical basic conditions, and the intricate bio-geochemical processes that govern nutrient retention, transformation, and transport. Specifically, we suggest a step-wise approach to custom VFS designs that links and matches the incoming P from event to multi-annual timescales from the short- and mid-term processes of P retention in the effective soil volume and to the longer-term P retention and offtake coupled to the soil-vegetation system. An a priori assessment of the P export potential should be followed by bespoke VFS designs, in line with local conditions and socio-economic and ecological constraints. To cope with increasingly nutrient saturated or functionally insufficient VFS installed over the last decades, concepts and management strategies need to encompass the transition in understanding of VFS as simple nutrient containers to multifunctional buffer zones that have a complex inner life. We need to address these associated emerging challenges and integrate their implications more thoroughly into VFS research, monitoring, policy, and implementation than ever before. Only then we may get VFS that are effective, sustainable, and persistent. |
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| publications-2172 |
Peer reviewed articles |
2022 |
Valenzuela, FJ; Reineke, D; Leventini, D; Chen, CCL; Barrett-Lennard, EG; Colmer, TD; Dodd, IC; Shabala, S; Brown, P; Bazihizina, N |
Plant responses to heterogeneous salinity: agronomic relevance and research priorities |
Annals of Botany |
10.1093/aob/mcac022 |
IoT & Sensors |
Uncategorized |
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Abstract Background Soil salinity, in both natural and managed environments, is highly heterogeneous, and understanding how plants respond to this spatiotemporal heterogeneity is increasingly important for sustainable agriculture in the era of global climate change. While the vast majority of research on crop response to salinity utilizes homogeneous saline conditions, a much smaller, but important, effort has been made in the past decade to understand plant molecular and physiological responses to heterogeneous salinity mainly by using split-root studies. These studies have begun to unravel how plants compensate for water/nutrient deprivation and limit salt stress by optimizing root-foraging in the most favourable parts of the soil. Scope This paper provides an overview of the patterns of salinity heterogeneity in rain-fed and irrigated systems. We then discuss results from split-root studies and the recent progress in understanding the physiological and molecular mechanisms regulating plant responses to heterogeneous root-zone salinity and nutrient conditions. We focus on mechanisms by which plants (salt/nutrient sensing, root-shoot signalling and water uptake) could optimize the use of less-saline patches within the root-zone, thereby enhancing growth under heterogeneous soil salinity conditions. Finally, we place these findings in the context of defining future research priorities, possible irrigation management and crop breeding opportunities to improve productivity from salt-affected lands. |
773903 |
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| publications-2173 |
Peer reviewed articles |
2022 |
Salcedo, FP; Cutillas, PP; Cabanero, JJA; Vivaldi, AG |
Use of remote sensing to evaluate the effects of environmental factors on soil salinity in a semi-arid area |
Science of the Total Environment |
10.1016/j.scitotenv.2021.152524 |
Uncategorized |
Uncategorized |
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No abstract available |
773903 |
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| publications-2174 |
Peer reviewed articles |
2019 |
JosĂ© MirĂĄs-Avalos, JosĂ© Rubio-Asensio, Juan RamĂrez-Cuesta, JosĂ© Maestre-Valero, Diego Intrigliolo |
Irrigation-AdvisorâA Decision Support System for Irrigation of Vegetable Crops |
Water |
10.3390/w11112245 |
Data Management & Analytics |
Wastewater Treatment Plants |
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Climate change will intensify water scarcity, and therefore irrigation must be adapted to save water. Operational tools that provide watering recommendations to end-users are needed. This work presents a new tool, Irrigation-Advisor (IA), which is based on weather forecasts and is able to separately determine soil evaporation and crop transpiration, and thus is adaptable to a broad range of agricultural situations. By calculating several statistical indicators, IA was tested against the FAO-56 crop evapotranspiration (ETcFAO) methodology using local crop coefficients. Additionally, IA recommendations were compared with current standard practices by experienced farmers (F). Six field experiments with four widely cultivated species (endive, lettuce, muskmelon and potato) were performed in Southeast Spain. Irrigation water applied, crop yield, aboveground biomass and water productivity were determined. Crop water needs underestimations (5%â20%) were detected when comparing IA against ETcFAO, although the index of agreement proved reasonable adjustments. The IA recommendations led to water savings up to 13% when compared to F, except for lettuce, with a 31% surplus in irrigation when using IA. Crop yield was not compromised and water productivity was increased by IA. Therefore, IA mimicked the farmersâČ irrigation strategies fairly well without deploying sensors on-site. Nevertheless, improvements are needed for increasing the accuracy of IA estimations. |
773903 |
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| publications-2175 |
Peer reviewed articles |
2020 |
Lizardo Reyna-Bowen, Pilar Fernandez-Rebollo, JesĂșs FernĂĄndez-Habas, JosĂ© A. GĂłmez |
The influence of tree and soil management on soil organic carbon stock and pools in dehesa systems |
CATENA |
10.1016/j.catena.2020.104511 |
Data Management & Analytics |
Wastewater Treatment Plants |
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No abstract available |
773903 |
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| publications-2176 |
Peer reviewed articles |
2022 |
Istanbuly, MN; Krasa, J; Amiri, BJ |
How Socio-Economic Drivers Explain Landscape Soil Erosion Regulation Services in Polish Catchments |
International Journal of Environmental Research and Public Health |
10.3390/ijerph19042372 |
Data Management & Analytics |
Uncategorized |
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Most studies that address the relationship between socio-economic characteristics and soil erosion focus on the effects of soil erosion on socio-economic conditions at different levels, from global to smallholder. Few, if any, efforts are made to address the influence of socio-economic variables on the soil erosion rate as an indicator of landscape degradation. The present study was carried out using spatial data from 402 catchments that cover Poland, to find out how socio-economic variables, which include area-weighted average income per capita (PLN kmâ2), area-weighted average gross domestic product (PLN kmâ2), population density (person kmâ2), and human development index can drive the soil erosion rate (kg haâ1 yrâ1), along with annual precipitation, soil and geomorphological variables that include soil organic carbon content, soil water content, clay ratio, stream gradient, and terrain slope. The results showed that the soil erosion rate is indirectly driven by the socio-economic variables in the study catchments, as it is alleviated by increasing population density, the area-weighted average gross domestic product, and the human development index. Furthermore, analyzing the incremental relationship between soil erosion rate and the area-weighted average of socio-economic variables revealed that no uniform change can be observed in the relationship between the area-weighted average socio-economic variables and soil erosion in the study catchments. |
773903 |
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| publications-2177 |
Peer reviewed articles |
2022 |
Liebhard, G; Klik, A; Stumpp, C; Nolz, R |
Partitioning evapotranspiration using water stable isotopes and information from lysimeter experiments |
Hydrological Sciences Journal-Journal Des Sciences Hydrologiques |
10.1080/02626667.2022.2030866 |
Variable-rate nitrogen fertilization of winter wheat under high spatial resolution |
Irrigation Systems |
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No abstract available |
773903 |
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| publications-2178 |
Peer reviewed articles |
2021 |
Istanbuly, MN; Dostal, T; Amiri, BJ |
Modeling the Soil Erosion Regulation Ecosystem Services of the Landscape in Polish Catchments |
Water |
10.3390/w13223274 |
Predictive Analytics |
Irrigation Systems |
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In this study, the soil erosion regulation ecosystem services of the CORINE land use/ land cover types along with soil intrinsic features and geomorphological factors were examined by using the soil erosion data of 327 catchments in Poland, with a mean area of 510 ± 330 km2, applying a multivariate regression modeling approach. The results showed that soil erosion is accelerated by the discontinuous urban fabric (r = 0.224, p †0.01), by construction sites (r = 0.141, p †0.05), non-irrigated arable land (r = 0.237, p †0.01), and is mitigated by coniferous forest (r = â0.322, p †0.01), the clay ratio (r = â0.652, p †0.01), and the organic content of the soil (r = â0.622, p †0.01). The models also indicated that there is a strong relationship between soil erosion and the percentage of land use/land cover types (r2 = [0.62, 0.82, 0.83, 0.74]), i.e., mixed forest, non-irrigated arable land, fruit trees and berry plantations, broad-leaf forest, sport and leisure facilities, construction sites, and mineral extraction sites. The findings show that the soil erosion regulation ecosystem service is sensitive to broadleaf forests, rainfed agriculture, soil water content, terrain slope, drainage network density, annual precipitation, the clay ratio, the soil carbon content, and the degree of sensitivity increases from the broadleaf forest to the soil carbon content. |
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| publications-2179 |
Peer reviewed articles |
2021 |
Francis Kilundu Musyoka, Peter Strauss, Guangju Zhao, Raghavan Srinivasan, Andreas Klik |
Multi-Step Calibration Approach for SWAT Model Using Soil Moisture and Crop Yields in a Small Agricultural Catchment |
Water |
10.3390/w13162238 |
Simulation & Modeling |
Irrigation Systems |
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The quantitative prediction of hydrological components through hydrological models could serve as a basis for developing better land and water management policies. This study provides a comprehensive step by step modelling approach for a small agricultural watershed using the SWAT model. The watershed is situated in Petzenkirchen in the western part of Lower Austria and has total area of 66 hectares. At present, 87% of the catchment area is arable land, 5% is used as pasture, 6% is forested and 2% is paved. The calibration approach involves a sequential calibration of the model starting from surface runoff, and groundwater flow, followed by crop yields and then soil moisture, and finally total streamflow and sediment yields. Calibration and validation are carried out using the r-package SWATplusR. The impact of each calibration step on sediment yields and total streamflow is evaluated. The results of this approach are compared with those of the conventional model calibration approach, where all the parameters governing various hydrological processes are calibrated simultaneously. Results showed that the model was capable of successfully predicting surface runoff, groundwater flow, soil profile water content, total streamflow and sediment yields with Nash-Sutcliffe efficiency (NSE) of greater than 0.75. Crop yields were also well simulated with a percent bias (PBIAS) ranging from â17% to 14%. Surface runoff calibration had the highest impact on streamflow output, improving NSE from 0.39 to 0.77. The step-wise calibration approach performed better for streamflow prediction than the simultaneous calibration approach. The results of this study show that the step-wise calibration approach is more accurate, and provides a better representation of different hydrological components and processes than the simultaneous calibration approach. |
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| publications-2180 |
Peer reviewed articles |
2021 |
D. Tzohar, M. Moshelion, A. BenâGal |
Compensatory hydraulic uptake of water by tomato due to variable rootâzone salinity |
Vadose Zone Journal |
10.1002/vzj2.20161 |
Uncategorized |
Irrigation Systems |
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AbstractPlant root systems are exposed to spatial and temporal heterogeneity regarding water availability. In the longâterm, compensation, increased uptake by roots in areas with favorable conditions in response to decreased uptake in areas under stress, is driven by root growth and distribution. In the shortâterm (hoursâdays), compensative processes are less understood. We hypothesized hydraulic compensation where local lowered water availability is accompanied by increased uptake from areas where water remains available. Our objective was to quantify instantaneous hydraulic root uptake under conditions of differential water availability. Tomato (Solanum lycopersicum L.) plants were grown in splitâroot weighingâdrainage lysimeters in which each half of the roots could alternatively be exposed to shortâterm conditions of salinity. Uptake was quantified from each of the two root zone compartments. Oneâsided exposure to salinity immediately led to less uptake from the saltâaffected compartment and increased uptake from the nontreated compartment. Compensation occurred at salinity, caused by NaCl solution of 4 dS mâ1, that did not decrease uptake in plants with entire root systems exposed. At higher salinity, 6.44 dS mâ1, transpiration decreased by âŒ50% when the total root system was exposed. When only half of the roots were exposed, total uptake was maintained at levels of nonstressed plants with as much as 85% occurring from the nontreated compartment. The extent of compensation was not absolute and apparently a function of salinity, atmospheric demand, and duration of exposure. As long as there is no hydraulic restriction in other areas, temporary reduction in water availability in some parts of a tomato's root zone will not affect plantâscale transpiration. |
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